How to tell if you're overskimming?

[Myka]

Originally Posted by Slick Fork

I was wondering at what point do you start overskimming and how do you tell? I'm currently running a vertex in-180 ... at about 55 gallons total volume.

Any thoughts?

Imo you can't over-skim using a Vertex IN skimmer, period. You would need to use a very high-end skimmer on a very small tank.